code: def bChanged(self):
      self.a.setValue(1.0 / self.b.value(), blockSignal=self.aChanged)
  
file_path: pyqtgraph/pyqtgraph/examples/parametertree.py
imports: from _buildParamTypes import makeAllParamTypes
  import pyqtgraph
  from pyqtgraph.Qt import QtWidgets
  import pyqtgraph.parametertree.parameterTypes
  from pyqtgraph.parametertree import Parameter, ParameterTree
label_desc: Use image node_id 3 for calling the ComplexParameter obj's underlying member method code with example usage: obj.bChanged() without return types